Question

我正在使用回收站视图来显示包含12个项目的列表。一次可以看到3到4个项目。我在每个卡片行中显示了更多按钮。如果我点击显示第一张卡片行的更多按钮，当我向下滚动显示另一张卡片行的更多按钮将自动被选中。为什么会发生这种情况，我该如何解决这个问题。

以下是我如何设置适配器的代码：

ToadlineAdapter toadlineAdapter = new ToadlineAdapter(mContext, getData1());
 recyclerView.setAdapter(toadlineAdapter);
 toadlineAdapter.setClickListener(this);
 recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

我的适配器代码：

public class ToadlineAdapter extends RecyclerView.Adapter<ToadlineAdapter.MyViewHolder> implements ToadlineCommentAdapter.ClickListener {

    private ClickListener clickListener;
    private SwipeRefreshLayout.OnRefreshListener clickListener1;
    private LayoutInflater inflater;
    Context mContext;
    List<TimelineDataStore> data = Collections.EMPTY_LIST;
    public ToadlineAdapter(Context context, List<TimelineDataStore> data) {

        inflater = LayoutInflater.from(context);
        this.data = data;
        mContext = context;       
    }    

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {    
        View view = inflater.inflate(R.layout.single_card_row, parent, false);
        MyViewHolder viewHolder = new MyViewHolder(view);
        return viewHolder;
    }    

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        TimelineDataStore current = data.get(position);

        if (clickedPosition.equals("post")) {
            holder.postHeader.setText(current.postHeader);
            holder.postDescription.setText(current.postDescription);        
        }    
    }

    @Override
    public int getItemCount() {    
        return data.size();
    }

    public void setClickListener(ClickListener clickListener) {
        this.clickListener = clickListener;
    }

    public void setClickListener1(SwipeRefreshLayout.OnRefreshListener clickListener1) {
        this.clickListener1 = clickListener1;
    }

    @Override
    public void itemClicked(View view, int position) {

    }    

    // View Holder object for Recycler View
    class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, SwipeRefreshLayout.OnRefreshListener, ToadlineCommentAdapter.ClickListener {

        TextView postHeader, postDescription;          

 public MyViewHolder(View itemView) {
            super(itemView);
            itemView.setOnClickListener((View.OnClickListener) this);
            postHeader = (TextView) itemView.findViewById(R.id.textViewTitle);
            postDescription = (TextView) itemView.findViewById(R.id.textViewPostDescription);
            mCardView = (CardView) itemView.findViewById(R.id.card_view);
            mShowMore = (ImageButton) itemView.findViewById(R.id.buttonSeeMore);
            mShowLess = (ImageButton) itemView.findViewById(R.id.buttonSeeLess);     

            mShowMore.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {    
                    int clickedPosition = getAdapterPosition();
                    TimelineDataStore current = data.get(clickedPosition);

                    current.postDescription = data.get(clickedPosition).postDescription;

                    postDescription.setVisibility(View.VISIBLE);
                    pollPostImages.setVisibility(View.VISIBLE);
                    mShowMore.setVisibility(View.GONE);
                    mShowLess.setVisibility(View.VISIBLE);         
                }    
            });    

            mShowLess.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {    
                    postDescription.setVisibility(View.GONE);
                    pollPostImages.setVisibility(View.GONE);
                    mShowMore.setVisibility(View.VISIBLE);
                    mShowLess.setVisibility(View.GONE);    
                }    
            });
}

Answer 1

每行都有相同的OnClickListener，因为您在ViewHolder类中设置了它。实现您想要的行为的一种方法是在OnClickListener方法中设置OnBindViewHolder：

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    TimelineDataStore current = data.get(position);

        holder.mShowMore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                int clickedPosition = getAdapterPosition();
                TimelineDataStore current = data.get(clickedPosition);

                current.postDescription = data.get(clickedPosition).postDescription;

                postDescription.setVisibility(View.VISIBLE);
                pollPostImages.setVisibility(View.VISIBLE);
                mShowMore.setVisibility(View.GONE);
                mShowLess.setVisibility(View.VISIBLE);     
            }
            holder.mShowLess.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                postDescription.setVisibility(View.GONE);
                pollPostImages.setVisibility(View.GONE);
                mShowMore.setVisibility(View.VISIBLE);
                mShowLess.setVisibility(View.GONE);

            }


}

为什么在Recycler View中滚动时自动为另一个位置选择一个按钮

1 个答案: